Carton transport vehicle

Abstract

The invention relates to the technical field of emulsion explosive production operation equipment, in particular to a carton transport vehicle. Comprising a loading platform, a transportation platform driving the loading platform to move and a lifting mechanism carried on the transportation platform and used for driving the loading platform to ascend and descend. The lifting mechanism is connected with the loading platform through a self-locking mechanism, and the self-locking mechanism is configured to control the loading platform to conduct deflection unloading when the loading platform is located at the designated height. According to the carton transport vehicle, the carton transport vehicle can have the functions of transferring, lifting and discharging cartons at the same time, that is, the accurate feeding process of the cartons can be completed only through one carton transport vehicle, two-time manual carrying is not needed, too much workshop space is not occupied, and multiple purposes are achieved at one stroke.

Description

Technical Field

[0001] The invention relates to the technical field of emulsion explosive production equipment, and in particular to a carton transport vehicle. Background Art

[0002] After the emulsion explosives are produced, they need to be packaged and transported in cartons. In the transportation of cartons in the emulsion explosives workshop, the traditional method of directly stacking cartons on the crawler faces the problems of high stacking difficulty and irregularity due to the height and speed characteristics of the crawler transport system. Therefore, in order to optimize the operation process and reduce the manpower burden, the existing packaging production line has introduced an automatic carton unloading device. The device allows the corrugated cardboard boards that have not yet been folded to be neatly placed on the loading platform, and then automatically lifted and pushed to the crawler for the subsequent box folding and packaging process, which significantly improves the accuracy and efficiency of placement.

[0003] However, the current design has problems such as insufficient space utilization and potential safety hazards: first, the space at the junction with the track is compact, which limits the space for placing cartons, thereby increasing the risk of injuries to the backs of workers' hands and arms during loading and unloading; second, the carton pusher is still a certain distance away from the location where the cartons are placed, and workers have to carry the cartons for a long time, which is labor-intensive; third, when the device is not in working condition, the propulsion rod is comparable to the length of the cargo platform, resulting in a large overall space occupation and a complex structural design, which is not conducive to the optimization of the workshop layout.

[0004] Therefore, it is necessary to design a carton transport vehicle for the emulsion explosive packaging line with a certain height, which can quickly stack, transfer and unload corrugated cartons. Summary of the invention

[0005] Compared with the manual stacking and loading of corrugated cardboard, the automated carton unloading device ensures the accuracy and efficiency of loading and placing, but it still requires two transfer processes from the stacking site of the corrugated cardboard to the carton unloading device, that is, the workers need to first transfer the cartons from the stacking site to the transport cart, and then transport the cart to the unloading device and then transfer the cardboards on the cart to the loading platform. The two transfer processes will undoubtedly increase the labor intensity of the workers; and the space of the entire loading platform area is narrow, which may easily cause people to be bumped and injured during the transportation of the carton boards; at the same time, the entire loading platform and the push rod occupy a large space as a whole, which may also cause congestion in the workshop space and is not conducive to layout optimization. In order to solve the above problems, the present invention systematically modifies the traditional carton transport vehicle so that it can simultaneously have the functions of transferring, lifting and unloading cardboard boxes, that is, only one carton transport vehicle is needed to complete the precise loading process of cardboard boxes, which does not require two manual handlings and does not occupy too much workshop space, achieving multiple goals at one stroke. The specific technical solutions to the above problems are as follows: The present invention provides a carton transport vehicle, comprising a loading platform, a transport platform for driving the loading platform to move, and a lifting mechanism mounted on the transport platform for driving the loading platform to move up and down; The lifting mechanism is connected to the loading platform via a self-locking mechanism, and the self-locking mechanism is configured to control the loading platform to deflect and unload when the loading platform is at a specified height.

[0006] Furthermore, the loading platform includes alignment plates arranged perpendicular to each other and a roller plate formed by a plurality of roller arrays; the front ends of the two side brackets of the roller plate are provided with positioning rods extending forward, and the rear ends are provided with horizontally arranged sleeves; the two ends of the self-locking mechanism are respectively inserted into the sleeves and in contact with the transport platform.

[0007] Furthermore, the transport platform includes a first surface, a second surface, and a third surface which are perpendicular to each other; the first surface is parallel to and close to the alignment plate, and the third surface is parallel to and close to the roller plate; universal wheels are arranged between the four corners of the third surface and the ground; a pushing frame is arranged on the top of the second surface.

[0008] Furthermore, the self-locking mechanism includes a mounting tube, and both ends of the mounting tube are slidably connected with self-locking rods through a cross slide block and a cross slide groove; an ejection spring is sleeved between the outside of the self-locking rod and the end of the mounting tube to ensure that the self-locking rod always slides out relative to the mounting tube; The end of the self-locking rod is provided with a first locking block and a second locking block at intervals along the length direction of the self-locking rod; A No. 1 blocking block and a No. 2 blocking block are arranged in the sleeve along the length direction of the sleeve at intervals; wherein the No. 1 blocking block and the No. 2 blocking block are arranged opposite to each other, and the distance between the No. 1 blocking block and the No. 2 blocking block, the width between the No. 1 locking block and the No. 2 locking block, and the distance between the No. 1 locking block and the No. 2 locking block are all equal; The top of the self-locking rod is hemispherical and inserted into a sliding groove opened on the inner side of the second surface, and the length of the sliding groove is less than the maximum lifting height of the self-locking rod.

[0009] Furthermore, a No. 3 blocking block is closely arranged on the side of the No. 2 blocking block away from the No. 1 blocking block, a deflection limit groove is provided between the No. 3 blocking block and the No. 2 blocking block, and the width of the deflection limit groove is consistent with the width of the No. 2 blocking block; the central angle corresponding to the deflection limit groove is an acute angle.

[0010] Furthermore, a ball bearing is sleeved and installed between the part of the self-locking rod located inside the sleeve and the mounting cylinder and the sleeve and the mounting cylinder.

[0011] Furthermore, the end faces of the No. 1 blocking block and the No. 2 blocking block are both provided with balls.

[0012] Furthermore, the lifting mechanism includes a pair of No. 1 lifting cylinders and a pair of No. 2 lifting cylinders, wherein the extended end of the No. 1 lifting cylinder is fixedly connected to the outer surface of the mounting tube, and the extended end of the No. 2 lifting cylinder is rotatably connected to the outer surface of the sleeve through a bearing.

[0013] Furthermore, a stabilizing groove slidably connected to the alignment plate is provided on one side of the top of the second surface close to the alignment plate.

[0014] Furthermore, a pair of rollers is provided on the inner side of one end of the third surface away from the second surface.

[0015] Based on the traditional carton transport vehicle, the present invention has a separate loading platform, which is connected to the transport platform through a lifting mechanism and a self-locking mechanism; a corresponding trigger mechanism is installed on the transport platform, and when the lifting mechanism lifts or lowers the loading platform to a specified height, the trigger mechanism will start and control the self-locking mechanism to release or restore the lock on the loading platform, so that the loading platform can automatically tilt and reset, which facilitates the cardboard to slide down onto the crawler under the action of its own gravity when tilting, and facilitates the stable loading and stacking of the cardboard when resetting, thereby completing the cardboard loading process. In this process: Because unloading relies on the cartons' own gravity to slide down the inclined loading platform onto the crawler tracks, during the entire loading process, workers only need to be responsible for transferring the cartons from the stack to the carton transport vehicle. This greatly reduces the labor intensity of the loading workers and avoids the loading workers getting too close to the assembly line during the unloading process, thus ensuring safety. The carton transport vehicle itself has a lifting function, so it can directly place the stacked cartons on a crawler with a certain height, avoiding the tediousness and effort of manual lifting. And when the carton is lifted to the specified height, the self-locking mechanism can automatically release the lock on the loading platform, allowing it to deflect and tilt relative to the extended end of the lifting mechanism and enter the unloading state. The switching of this unloading state does not rely on other electrical control structures, but is achieved through the triggering of the transport platform, the ingenious structural design of the self-locking mechanism, and the power output of the lifting mechanism. This holistic design can not only reduce the space occupied by the transport vehicle, but also reduce the transport vehicle's demand for electrical energy, ensuring the transport vehicle's endurance and flexibility; The transport vehicle of the present invention can be moved to the designated area according to the wishes of the loading workers. It does not need to be fixed to the track area and occupy a large amount of workshop space like the traditional automated carton unloading device, which facilitates the optimization of the spatial layout inside the workshop. At the same time, the transport vehicle is open on three sides in the loaded state, which is convenient for loading and unloading, and can adapt to the loading and unloading requirements of a variety of similar goods, and has a certain degree of versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1This is a schematic diagram of the structure of the transport trolley in the loading state of the present invention; Figure 2 This is a schematic diagram of the structure of the transport trolley in the unloading state of the present invention; Figure 3 This is a schematic diagram of the structure of the transport platform of the present invention; Figure 4 This is a schematic diagram of the loading platform structure of the present invention; Figure 5 It is a schematic diagram of the lifting mechanism structure of the present invention; Figure 6 It is a structural schematic diagram of the self-locking mechanism of the present invention; Figure 7 It is a schematic diagram of the internal structure of the sleeve of the present invention; Figure 8 This is a schematic diagram of the self-locking rod structure of the present invention; Fig. 9 This is a schematic diagram of the extended end structure of the No. 2 lifting cylinder of the present invention; In the figure: 1. loading platform; 101. alignment plate; 102. roller plate; 103. positioning rod; 104. sleeve; 2. transport platform; 201. first side; 202. second side; 203. third side; 204. universal wheel; 205. pushing frame; 3. lifting mechanism; 301. No. 1 lifting cylinder; 302. No. 2 lifting cylinder; 4. self-locking mechanism; 401. mounting cylinder; 402. cross slider; 403. self-locking rod; 404. ejection spring; 405. No. 1 locking block; 406. No. 2 locking block; 407. No. 1 blocking block; 408. No. 2 blocking block; 409. No. 3 blocking block; 410. sliding groove; 411. deflection limit groove; 5. ball bearing; 6. ball; 7. stabilizing groove; 8. roller. DETAILED DESCRIPTION

[0017] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with examples. The examples are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0018] like Figure 1-2 As shown, the present invention provides a carton transport vehicle, comprising a loading platform 1, a transport platform 2 for driving the loading platform 1 to move, and a lifting mechanism 3 mounted on the transport platform 2 for driving the loading platform 1 to move up and down; The lifting mechanism 3 is connected to the loading platform 1 via a self-locking mechanism 4 , and the self-locking mechanism 4 is configured to control the loading platform 1 to deflect and unload when the loading platform 1 is at a specified height.

[0019] like Figure 4As shown, the loading platform 1 includes an alignment plate 101 arranged perpendicularly to each other and a roller plate 102 formed by a plurality of roller arrays; the front ends of the two side brackets of the roller plate 102 are each provided with a positioning rod 103 extending forward, and the rear ends are each provided with a horizontally arranged sleeve 104; the two ends of the self-locking mechanism 4 are respectively inserted into the sleeve 104 and in contact with the transport platform 2.

[0020] like Figure 3 As shown, the transport platform 2 includes a first surface 201, a second surface 202, and a third surface 203 which are perpendicular to each other; the first surface 201 is parallel to and close to the alignment plate 101, and the third surface 203 is parallel to and close to the roller plate 102; universal wheels 204 are arranged between the four corners of the third surface 203 and the ground; a pushing frame 205 is arranged on the top of the second surface 202.

[0021] A stabilizing groove 7 slidably connected to the alignment plate 101 is provided on a side of the top of the second surface 202 close to the alignment plate 101 .

[0022] A pair of rollers 8 is disposed on the inner side of one end of the third surface 203 away from the second surface 202 .

[0023] like Figure 6-8 As shown, the self-locking mechanism 4 includes a mounting tube 401, and both ends of the mounting tube 401 are slidably connected with self-locking rods 403 through a cross slide 402 and a cross slide groove; an ejection spring 404 is sleeved between the outside of the self-locking rod 403 and the end of the mounting tube 401, which is used to ensure that the self-locking rod 403 always slides out relative to the mounting tube 401; The end of the self-locking rod 403 is provided with a first locking block 405 and a second locking block 406 at intervals along the length direction of the self-locking rod 403; A first blocking block 407 and a second blocking block 408 are arranged in the sleeve 104 along the length direction of the sleeve 104 at intervals; wherein the first blocking block 407 and the second blocking block 408 are arranged opposite to each other, and the distance between the first blocking block 407 and the second blocking block 408, the width between the first locking block 405 and the second locking block 406, and the distance between the first locking block 405 and the second locking block 406 are all equal; The top of the self-locking rod 403 is hemispherical and inserted into a sliding groove 410 opened on the inner side of the second surface 202 , and the length of the sliding groove 410 is smaller than the maximum lifting height of the self-locking rod 403 .

[0024] A No. 3 blocking block 409 is closely arranged on the side of the No. 2 blocking block 408 away from the No. 1 blocking block 407, and a deflection limit groove 411 is opened between the No. 3 blocking block 409 and the No. 2 blocking block 408, and the width of the deflection limit groove 411 is consistent with the width of the No. 2 blocking block 408; the central angle corresponding to the deflection limit groove 411 is an acute angle.

[0025] A ball bearing 5 is sleeved and installed between the part of the self-locking rod 403 located inside the sleeve 104 and the installation cylinder 401 and the sleeve 104 and the installation cylinder 401 .

[0026] The end faces of the No. 1 blocking block 407 and the No. 2 blocking block 408 are both provided with balls 6 .

[0027] like Figure 5 , Fig. 9 As shown, the lifting mechanism 3 includes a pair of No. 1 lifting cylinders 301 and a pair of No. 2 lifting cylinders 302, wherein the extending end of the No. 1 lifting cylinder 301 is fixedly connected to the outer surface of the mounting tube 401, and the extending end of the No. 2 lifting cylinder 302 is rotatably connected to the outer surface of the sleeve 104 through a bearing.

[0028] Universal wheels 204 are installed between the four corners of the third surface 203 of the transport platform 2 and the ground, so when the feeding worker holds the pushing frame 205 and applies a pushing force or a pulling force, the transport platform 2 can be easily pushed or pulled to move.

[0029] The transport platform 2 is pulled to the cardboard stacking place, and then the cardboard is moved from the opposite side of the alignment plate 101 to the roller plate 102, and the cardboard is pressed against the alignment plate 101. At this time, the uneven cardboards will be aligned due to the blocking of the alignment plate 101. The neat cardboard pile can not only maximize the stacking height and improve the efficiency of a single transport, but also ensure the stability during the transport process.

[0030] As the number of cardboard boxes on the roller plate 102 continues to increase, the load of the roller plate 102 will inevitably increase. Only one side of the entire roller plate 102 close to the second surface 202 is fixed by the No. 1 lifting cylinder 301 and the No. 2 lifting cylinder 302 in the lifting mechanism 3, that is, the stabilizing force of the roller plate 102 comes from one side, which is not stable. Therefore, in order to improve the stability of the cardboard boxes during transportation, a pair of rollers 8 are arranged on the inner side of the end of the third surface 203 away from the second surface 202. The rollers 8 can provide support for the roller plate 102 at the bottom of the side of the roller plate 102 away from the second surface 202, thereby ensuring that the roller plate 102 can be stably erected above the third surface 203 to complete the loading and support of the cardboard boxes. Similarly, the alignment plate 101 also has the situation where the stabilizing force comes from one side. Therefore, in order to further enhance the stability of the cardboard box during transportation and prevent the upper part of the alignment plate 101 from deforming when being pressed tightly, which affects the alignment effect of the cardboard, a stabilizing groove 7 is provided above the second surface 202. The alignment plate 101 can be inserted in the stabilizing groove 7 and use the supporting force provided by the groove wall of the stabilizing groove 7 to ensure the flatness and stability of the entire board surface.

[0031] After the cartons are loaded, the loading worker holds the pushing frame 205 to transfer and push the entire transport platform 2 to the crawler of the packaging line. Since the crawler in the packaging line is still a certain height from the ground, it is necessary to start two sets of lifting cylinders No. 1 and No. 2 at the same time. The main parts of the lifting cylinders No. 1 and No. 2 are fixedly installed above the second surface 202, and their respective extended ends are fixedly connected to the mounting cylinder 401 in the self-locking mechanism 4 and rotatably connected to the sleeve 104 on the roller plate 102, and the self-locking rod 403 in the self-locking mechanism 4 is inserted between the sleeve 104 and the mounting cylinder 401. Therefore, the lifting action of the No. 1 lifting cylinder 301 on the mounting cylinder 401 will also transmit the lifting force to the roller plate 102 through the mounting cylinder 401, the self-locking rod 403, and the sleeve 104 in turn. That is to say, when the extension ends of the No. 1 lifting cylinder 301 and the No. 2 lifting cylinder 302 are contracted, they can simultaneously apply a lifting force to the roller plate 102, so that the roller plate 102 can rise synchronously with the paperboard supported on its surface.

[0032] In this process, since one end of the self-locking rod 403 is inserted into the interior of the installation tube 401 through the cross slider 402, the self-locking rod 403 can only slide axially relative to the installation tube 401 but cannot rotate circumferentially under the limit of the cross structure, which effectively ensures that the self-locking mechanism 4 is in a locked state, and the self-locking rod 403 and the roller plate 102 will not rotate relative to the installation tube 401, thereby ensuring the stability between the No. 1 lifting cylinder 301 and the roller plate 102. At this time, an ejection spring 404 is installed between the outer surface of the self-locking rod 403 and the end surface of the installation tube 401, and the self-locking rod 403 will slide out of the installation tube 401 due to the elastic force of the ejection spring 404. At the same time, in order to ensure the smoothness and stability of this sliding action, a ball bearing 5 is also installed inside the self-locking rod 403 located in the installation tube 401 to reduce sliding friction.

[0033] On the one hand, the self-locking rod 403 that is pushed out will drive the No. 1 locking block 405 and the No. 2 locking block 406 set at the other end thereof to align with the end faces of the No. 1 blocking block 407 and the No. 2 blocking block 408 in the sleeve 104 respectively. The lower surface of the No. 1 locking block 405 and the upper surface of the No. 2 locking block 406 will be blocked by the No. 1 blocking block 407 and the No. 2 blocking block 408 respectively to prevent the sleeve 104, that is, the roller plate 102 rotates and tilts relative to the self-locking rod 403, thereby achieving self-locking. In this state, the roller plate 102 will always be perpendicular to the length direction of the No. 1 lifting cylinder 301 and the No. 2 lifting cylinder 302, completing the task of transporting and carrying the cardboard; On the other hand, the hemispherical rod head at the top of the self-locking rod 403 can always be in the sliding groove 410 opened on the inner side of the second surface 202. This position state can effectively use the groove wall of the sliding groove 410 to limit the rod body of the self-locking rod 403 to ensure the stability of the entire roller plate 102 during the lifting process; more importantly, since the length of the sliding groove 410 is less than the maximum telescopic height of the No. 1 lifting cylinder 301 and the No. 2 lifting cylinder 302, when the roller plate 102 is lifted to a height above the crawler track, the rod head of the self-locking rod 403 will be forced to slide out of the sliding groove 410. The reason why the rod head of the self-locking rod 403 is designed to be hemispherical is to ensure the smoothness and stability of this sliding action. After the self-locking rod 403 is separated from the sliding groove 410, it will inevitably be forced to overcome the elastic force of the ejection spring 404 and shrink into the installation tube 401 due to the disappearance of the depth of the sliding groove 410. The sliding and contracting self-locking rod 403 will inevitably drive the first locking block 405 and the second locking block 406 to move synchronously toward the third blocking block 409. At this time, the first locking block 405 and the second locking block 406 will be separated from the end faces of the first blocking block and the second blocking block respectively due to the above-mentioned movement. At this time, the first locking block 405 will be located in the gap between the first blocking block 407 and the first blocking block 407, and the second locking block 406 will be located in the deflection limit groove 411 opened between the second blocking block 408 and the third blocking block 409. In other words, the second blocking block 408 is just located in the gap between the first locking block 405 and the second locking block 406. Since there is no end face of the first blocking block 407 and the second blocking block 408 to block the first locking block 405 and the second locking block 406, the self-locking rod 403 can deflect by itself, that is, unlocking is achieved.

[0034] That is to say, when the No. 1 lifting cylinder 301 and the No. 2 lifting cylinder 302 pull the roller plate 102 to the top of the crawler, the self-locking of the self-locking rod 403 will be triggered at this time. After unlocking, the self-locking rod 403 will allow the sleeve 104 to rotate relative to the self-locking rod 403, and the extension end of the No. 2 lifting cylinder 302 is rotatably connected to the outer surface of the sleeve 104 through a bearing, so it will not cause any obstruction to this deflection movement. However, this deflection angle is not infinite, because the No. 2 locking block 406 is located in the deflection limit groove 411. It only needs to control the central angle corresponding to the deflection limit groove 411 to be an acute angle, so that after the No. 2 locking block 406 deflects the acute angle, it will be blocked by the end face groove wall of the deflection limit groove 411 and stop deflecting. Therefore, the deflection angle of the entire roller plate 102 is also limited enough, and it is not an uncontrolled large-angle release deflection that causes the roller plate 102 to hit the crawler surface and cause the collapse of the cardboard pile.

[0035] During the deflection of the roller plate 102, the second blocking block 408 is just stuck in the gap between the first locking block 405 and the second locking block 406. This locking relationship can form an assembly relationship similar to that of a track and a slide groove, ensuring the stability of the roller plate 102 during the deflection process.

[0036] At the same time, in order to ensure that the self-locking rod 403 slides smoothly and stably in the sleeve 104, balls 6 are specially arranged on the end faces of the No. 1 blocking block 407 and the No. 2 blocking block 408, and a ball bearing 5 is also arranged between the self-locking rod 403 and the sleeve 104 to reduce sliding friction.

[0037] After the deflection is completed, the positioning rod 103 at the front end of the roller plate 102 will be aligned with the two sides of the crawler. At this time, the pile of cartons on the roller plate 102 will slide along the slightly inclined roller plate 102 to the crawler surface under the influence of its own weight, and the rolling rollers on the roller plate 102 will also make the sliding process smooth and stable; as the contact area between the bottom cardboard and the crawler continues to increase, the entire crawler will eventually transport the entire pile of cardboard boxes away. During the unloading process, the alignment plate 101 will always play a role in maintaining the stability and order of the cardboard boxes, thereby completing the loading of the cardboard boxes.

[0038] After the loading work is completed, continue to hold the push frame 205 to pull the loading platform 1 away from the crawler area, and then start the No. 1 lifting cylinder 301 and the No. 2 lifting cylinder 302 again to lower the roller plate 102. During the lowering process, the roller plate 102 will always maintain an inclined posture for unloading, until the bottom surface of the roller plate 102 away from the second surface 202 contacts the roller 8, and the roller 8 will push the roller plate 102 to reverse and reset during the continuous lowering process of the No. 1 lifting cylinder 301 and the No. 2 lifting cylinder 302, until the roller plate 102 is horizontal and returns to the initial state, at which time the No. 1 lifting cylinder 301 and the No. 2 lifting cylinder 302 are closed.

[0039] After the roller plate 102 returns to its horizontal state, it means that the No. 2 blocking block 408 will be disengaged from the gap between the No. 1 locking block 405 and the No. 2 locking block 406, and the rod head of the self-locking rod 403 will return to the sliding groove 410 again under the push of the ejection spring 404, and the No. 1 locking block 405 and the No. 2 locking block 406 will be aligned and fitted with the end faces of the No. 1 blocking block 407 and the No. 2 blocking block 408 again, so that the roller plate 102 is locked again, waiting for the next loading process to begin.

[0040] In summary, the present invention combines the triggering of the transport platform 2, the lifting of the lifting mechanism 3, and the locking and releasing of the self-locking mechanism 4 through a clever structure and trigger logic design, so that the loading platform 1 can just trigger the roller plate 102 to deflect and complete the unloading of the cardboard when it reaches the specified height. This coincidence in timing not only saves effort but also saves time, and provides a basic guarantee for improving the unloading efficiency. At the same time, the above-mentioned coordination enables an ordinary transport trolley to have the functions of transporting, lifting and automatic unloading at the same time. Under the premise that only one loading worker is required to carry it, the rest of the unloading process can be easily completed, which greatly reduces the labor intensity of the loading workers and ensures the loading efficiency. And the flexibility of the transport vehicle can completely remove it when loading is not needed to avoid occupying workshop space.

Claims

1. Carton transport vehicle, characterized by: It comprises a loading platform (1), a transport platform (2) for driving the loading platform (1) to move, and a lifting mechanism (3) mounted on the transport platform (2) and used for driving the loading platform (1) to move up and down; The lifting mechanism (3) is connected to the loading platform (1) via a self-locking mechanism (4), and the self-locking mechanism (4) is configured to control the loading platform (1) to deflect and unload when the loading platform (1) is at a specified height.

2. The carton transport vehicle according to claim 1, characterized in that: The loading platform (1) comprises an alignment plate (101) arranged perpendicularly to each other and a roller plate (102) formed by a plurality of roller arrays; the front ends of the two side brackets of the roller plate (102) are both provided with positioning rods (103) extending forward, and the rear ends are both provided with horizontally arranged sleeves (104); the two ends of the self-locking mechanism (4) are respectively inserted into the sleeves (104) and contact the transport platform (2).

3. The carton transport vehicle according to claim 1, characterized in that: The transport platform (2) comprises a first surface (201), a second surface (202), and a third surface (203) which are perpendicular to each other; the first surface (201) is parallel to and close to the alignment plate (101), and the third surface (203) is parallel to and close to the roller plate (102); universal wheels (204) are arranged between the four corners of the third surface (203) and the ground; and a pushing frame (205) is arranged on the top of the second surface (202).

4. The carton transport vehicle according to claim 2, characterized in that: The self-locking mechanism (4) comprises a mounting tube (401), and both ends of the mounting tube (401) are slidably connected with self-locking rods (403) through a cross slide block (402) and a cross slide groove; an ejection spring (404) is sleeved between the outside of the self-locking rod (403) and the end of the mounting tube (401), so as to ensure that the self-locking rod (403) always slides out relative to the mounting tube (401); The end of the self-locking rod (403) is provided with a first locking block (405) and a second locking block (406) at intervals along the length direction of the self-locking rod (403); A first blocking block (407) and a second blocking block (408) are arranged in the sleeve (104) along the length direction of the sleeve (104) at intervals; wherein the first blocking block (407) and the second blocking block (408) are arranged opposite to each other, and the distance between the first blocking block (407) and the second blocking block (408), the width between the first locking block (405) and the second locking block (406), and the distance between the first locking block (405) and the second locking block (406) are all equal; The top of the self-locking rod (403) is hemispherical and inserted into a sliding groove (410) opened on the inner side of the second surface (202), and the length of the sliding groove (410) is less than the maximum lifting height of the self-locking rod (403).

5. The carton transport vehicle according to claim 4, characterized in that: A third blocking block (409) is closely disposed on the side of the second blocking block (408) away from the first blocking block (407); a deflection limiting groove (411) is provided between the third blocking block (409) and the second blocking block (408); and the width of the deflection limiting groove (411) is consistent with the width of the second blocking block (408); and the central angle corresponding to the deflection limiting groove (411) is an acute angle.

6. The carton transport vehicle according to claim 4, characterized in that: A ball bearing (5) is sleeved and installed between the part of the self-locking rod (403) located inside the sleeve (104) and the installation cylinder (401) and the sleeve (104) and the installation cylinder (401).

7. The carton transport vehicle according to claim 4, characterized in that: The end surfaces of the No. 1 blocking block (407) and the No. 2 blocking block (408) are both provided with balls (6).

8. The carton transport vehicle according to claim 1, characterized in that: The lifting mechanism (3) comprises a pair of No. 1 lifting cylinders (301) and a pair of No. 2 lifting cylinders (302), wherein the extension end of the No. 1 lifting cylinder (301) is fixedly connected to the outer surface of the mounting cylinder (401), and the extension end of the No. 2 lifting cylinder (302) is rotatably connected to the outer surface of the sleeve (104) via a bearing.

9. The carton transport vehicle according to claim 4, characterized in that: A stabilizing groove (7) slidably connected to the alignment plate (101) is provided on a side of the top of the second surface (202) close to the alignment plate (101).

10. The carton transport vehicle according to claim 3, characterized in that: A pair of rollers (8) are arranged on the inner side of one end of the third surface (203) away from the second surface (202).

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